Various cheats
     Enter  these  codes at the continue screen in the Classical Ninja
Gaiden menu.

Cheat code:                    Effect:
At the main menu highlight 
New Game, hold Left Trigger + 
Right Trigger and press A      Original Blue Ninja Costume
L X A Y A X                    Skip to Act 1 in Classical Ninja Gaiden 1
A X X R Y A                    Skip to Act 2 in Classical Ninja Gaiden 1
X Y B R L X                    Skip to Act 3 in Classical Ninja Gaiden 1
B R A B Y Y                    Skip to Act 4 in Classical Ninja Gaiden 1
X A Y X L L                    Skip to Act 5 in Classical Ninja Gaiden 1
R Y R L A X                    Skip to Act 6 in Classical Ninja Gaiden 1
A A B X Y R                    Skip to Act 1 in Classical Ninja Gaiden 2
X L R B B A                    Skip to Act 2 in Classical Ninja Gaiden 2
L Y B A R R                    Skip to Act 3 in Classical Ninja Gaiden 2
A L X Y Y B                    Skip to Act 4 in Classical Ninja Gaiden 2
R A A B X L                    Skip to Act 5 in Classical Ninja Gaiden 2
Y L R A Y R                    Skip to Act 6 in Classical Ninja Gaiden 2
B B X Y A L                    Skip to Act 7 in Classical Ninja Gaiden 2
B Y R L X A                    Skip to Act 1 in Classical Ninja Gaiden 3
A R R Y A L                    Skip to Act 2 in Classical Ninja Gaiden 3
L B R Y L Y                    Skip to Act 3 in Classical Ninja Gaiden 3
R R B A Y X                    Skip to Act 4 in Classical Ninja Gaiden 3
Y A B X R X                    Skip to Act 5 in Classical Ninja Gaiden 3
B X X A X Y                    Skip to Act 6 in Classical Ninja Gaiden 3
X R X Y Y L                    Skip to Act 7 in Classical Ninja Gaiden 3
Hold the White button 
while selecting 
the 2nd trial mission          Wear the Dead or Alive costume
Hold the Black button 
while selecting 
the 2nd trial mission          Wear the Evil costume


Very Hard Difficulty
     Beat the game once on Normal or Hard.

Movie Gallery
     Beat the game on Normal or Hard to unlock all CG movies.

Skip Cut-Scenes
     You  can  skip most of the cut-scenes in Ninja Gaiden by pressing
START, A, START.

Plasma Saber
     Beat  the game on Normal to unlock a new costume and plasma saber
(Luke,  you  are  now  a ninja). To use the new costume, hold down the
LEFT TRIGGER and select New Game.